Regulated power supply is a kind of electronic equipment that can provide stable AC or DC power supply for load, that is to say, it can be divided into two categories, DC regulated power supply and AC regulated power supply. This paper will focus on the introduction of DC regulated power supply. Next, I will introduce the classification of DC regulated power supply and the design of two kinds of DC regulated power supply.



The working mode of DC regulated power supply is mainly divided into three points



1. Controlled rectifier type is to adjust the output voltage by changing the turn-on time of thyristor.



2. Chopper type, the input is unstable DC voltage, to change the on-off ratio of the switch circuit to obtain unidirectional pulsating DC, and to obtain stable DC voltage after filtering.



3. For the converter type, the unstable DC voltage should be transformed into high frequency AC through the inverter, and the new DC output voltage can be obtained after the voltage transformation rectification filtering, and fed back to the control inverter working frequency, so as to achieve the purpose of stabilizing the output DC voltage.